<!DOCTYPE html>
<html lang="en">

<head>
	<meta charset="UTF-8">
	<title>window</title>
</head>

<body>
	<div onclick="stop()">停止</div>
	<h1>我是03页面</h1>
	<div onclick="goBack()">回退到04页面</div>
	<script type="text/javascript">

   		ction goBack() {
   			退回到上一个页面
   			tory.back();
   		
   		sole.log(navigator.userAgent);
    // chrome :
    // Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko)
    // Chrome/84.0.4147.89 Safari/537.36

    // firefox :
    // Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Firefox/78.0

    // IE :
    // Mozilla/5.0 (Windows NT 10.0; WOW64; Trident/7.0; .NET4.0C; .NET4.0E;
    // .NET CLR 2.0.50727; .NET CLR 3.0.30729; .NET CLR 3.5.30729; rv:11.0) like Gecko

    // edge :
    // Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko)
    // Chrome/85.0.4183.83 Safari/537.36 Edg/85.0.564.44
	</script>

</body>

</html>